Congenital Dysplasia of the hip joint is a condition that results in the deformation, and possible chronic dislocation of the hip joint. The hip joint becomes deformed, leading to an unstable joint. Congenital Dysplasia starts at birth, but is an ongoing process, most detectable in adults. At birth, or soon after, children may appear to have perfectly normal hip joints, but later on in life, suffer from severe Congenital Dysplasia. The troublesome joint is usually replaced with artificial prosthesis.

Although Congenital Dysplasia can occur in men, it is more common in women. It has been noticed that about one man to every nine women acquire Congenital Dysplasia.